Our Team

Andrew Cooper

SabeRex Photo: Andrew Cooper

Chief Executive Officer (CEO) & Partner

Andrew Cooper has spent his entire professional career in the technology industry. Before founding TyRex Manufacturing Group with John Bosch, Jr. in 1995 and becoming the President / CEO of SabeRex, Andrew gained a wealth of knowledge in the fields of Aerospace, Electronics, and Voice / Data Infrastructure. Additionally, Andrew has extensive experience with international travel, global logistics, and cross-cultural relationships. He and his wife Robbi reside in Austin with their two children.

Rick Jennings

SabeRex Photo: Rick Jennings


With 30 years of professional business experience that includes leadership roles in operations, finance and information technology, Rick Jennings owns an unparalleled record of success in building businesses, developing new opportunities and strategic planning. Prior to joining SabeRex, Rick, who holds a BA from Wittenberg University and an MBA from SMU, honed his expertise in the cable television, retail and technology industries. He and his two children live in Austin.

Bill Brainerd

SabeRex Photo: Bill Brainerd

National Director of Business Development

An established sales professional, Bill Brainerd joined SabeRex in 2007 and presently works out of our offices in Nashville, TN. Prior to becoming a member of our team, Bill worked in the technology and service sectors for 20 years. He owns three degrees from Johnson & Wales University and has won numerous awards over the years, including the TyRex Circle of Business Trust Award in 2012 and the TyRex Professionalism Award in 2014. Bill has two children and enjoys cooking, travel, photography, scuba diving. He also volunteers in his spare time to train service animals.

John Craghead

SabeRex Photo: John Craghead

Supply Chain / Inventory Manager

With more than 30 years of manufacturing experience that includes roles in operations and production control, John Craghead brings unmatched insight to his position at SabeRex. After graduating from Weber State University, John began his career by working in the automotive safety industry before moving on to manage inventory and supply chain for SabeRex. He lives with his wife, Stephanie, and two children in Cedar Park.



Larry Krupicka

Photo: Larry Krupicka

Logistics Manager

A proven business executive, Larry Krupicka has built an exceptional record of success in the areas of distribution, operations and global program management over the last 20+ years. Prior to joining SabeRex in 2013, Larry worked for multiple organizations, including Flextronics Global Services and Jabil Global Services, where he managed strategic planning, budgeting, material procurement and inventory to ensure client customer service and profitability. An effective problem-solver and leader, he also has a track record for efficiency and customer satisfaction.

Jeff Walton

SabeRex Photo: Jeff Walton

Project Manager – RLG

With more than 30 years of professional experience in the technology sector, Jeff Walton brings a varied and vast amount of knowledge and expertise to his position at SabeRex. After graduating from Southwest Texas State University, Jeff embarked on a career in the technology industry that included stops at CCI/Triad, Motorola and Compuadd. Now managing the Reverse Logistics Division at SabeRex, Jeff continues to utilize his experience to solve client problems and provide solutions on a daily basis. Jeff lives in Round Rock with his girlfriend Rita and two dogs.

Robert Zawadzki

SabeRex Photo: Robert Zawadzki

Manufacturing Engineer / SabeRex Quality Manager

With over 25 years of experience in Manufacturing/Project/NPI and Supplier Engineering, Robert “Bob” Zawadzki brings a diverse set of skills to SabeRex. Throughout his career, Bob’s leadership has motivated teams to produce quality products in precision machining, plant/line layout, 3D printing, lean manufacturing, and computer electronics, as well as semiconductor equipment fabrication. A visionary who seeks to streamline processes for developing innovative products, Bob’s work has also been instrumental in cutting production costs. He holds an AAS from Austin Community College in Engineering Design Graphics, A BS with a double major in Mathematics and Physics, and a MS in Physics from Southwest Texas State University. Bob has lived in the Austin area since 1985.


Dan Chambers

3D Printing Lab Manager

Operations manager with more than 20 years of management and production experience in hydraulics, electric, technology, ceramics, and aerospace industries. Manages additive manufacturing processes and 3D print lab for SabeRex. As a member of the TyRex Bright Ideas committee, Dan identifies areas that could provide cost savings for all of TyRex’s properties with a focus on finding opportunities where 3D printing can provide fiscal, ergonomic, and operational advantages. Hailing from a military family and serving in the military himself, Dan believes in bringing excellence, honor, and pride in everything he does.

Robert Girdner

Product Design Engineer/Operations Manager – 3D Printing

Robert is a mechanical engineer experienced in engineering analysis, thermodynamics, kinematics and kinetics of particles and rigid bodies. With a strong analytical mind and an ability to solve complex problems, Robert is a proven leader with project background in machine design, fluid mechanics, and electrical networks and systems. His strong foundation in math has led to a track record of consistently meeting project deadlines under challenging and stressful environments.